Choloesteric liquid crystal display

Abstract

A cholesteric liquid crystal display is provided, including a substrate, a first electrode layer disposed on the substrate, and a liquid crystal layer disposed on the first electrode layer, wherein the liquid crystal layer comprises at least two liquid crystals having different sensitivities to driving frequencies, mixed with each other, and the liquid crystals having a greater initial state-transition temperature are more sensitive to driving frequency.

What is claimed is: 
     
         1 . A cholesteric liquid crystal display, comprising:
 a substrate;   a first electrode layer disposed on the substrate; and   a liquid crystal layer disposed on the first electrode layer, wherein the liquid crystal layer comprises at least two liquid crystals having different sensitivities to driving frequencies, mixed with each other, and the liquid crystals having a greater initial state-transition temperature are more sensitive to driving frequency.   
     
     
         2 . The cholesteric liquid crystal display as claimed in  claim 1 , further comprising a light absorbing layer. 
     
     
         3 . The cholesteric liquid crystal display as claimed in  claim 2 , wherein the light absorbing layer absorbs visible light, ultraviolet light or infrared light. 
     
     
         4 . The cholesteric liquid crystal display as claimed in  claim 2 , further comprising a second electrode layer, wherein the second electrode layer is a transparent electrode or opaque electrode. 
     
     
         5 . The cholesteric liquid crystal display as claimed in  claim 4 , wherein the second electrode layer is disposed over or under the light absorbing layer. 
     
     
         6 . The cholesteric liquid crystal display as claimed in  claim 1 , wherein the liquid crystal layer comprises a first liquid crystal and a second liquid crystal, and the first liquid crystal requires greater state-transition temperature than the second liquid crystal, and first liquid crystal is more sensitive to driving frequency voltage than the second liquid crystal. 
     
     
         7 . The cholesteric liquid crystal display as claimed in  claim 6 , wherein the first liquid crystal reflects a light with a first wavelength and the second liquid crystal reflects a light with a second wavelength. 
     
     
         8 . The cholesteric liquid crystal display as claimed in  claim 6 , wherein the liquid crystal layer further comprises a third liquid crystal, the third liquid crystal requires greater initial state-transition temperature than the first liquid crystals, and the third liquid crystal is more sensitive to driving frequency than the first liquid crystal.